King CountyFor more information about this layer please see the GIS Data Catalog . Basic demographics by census tracts in King County based on 2014 - 2018 American Community Survey 5 Year Average (ACS). Included demographics are: total population; foreign born; median household income; English language proficiency; languages spoken; race and ethnicity; sex; and age. Numbers and derived percentages are estimates based on the current year's ACS. GEO_ID_TRT is the key field and may be used to join to other demographic Census data tables.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/66332270c581437d9d09bc2eecbaa8aa_0engKing County GIS Open DataPublic2018 Demographic Base [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)2018